docs: correct fabric authority disposition

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a053ff-1d6f-7fe2-ac1c-a6eb40a42a0c

architecture/information-model_v0.1.yaml

@@ -155,7 +155,7 @@ entities:
     authority: policy-service
   - id: fabric_node
     kind: entity
-    authority: fin-hub
+    authority: railiance-fabric
   - id: ops_run
     kind: entity
     authority: activity-core
@@ -313,7 +313,7 @@ inventory_capability_map:
     owner: ops-hub
   - capability: fabric-graph
     kinds: [entity, relation, knowledge]
-    owner: fin-hub
+    owner: railiance-fabric
   - capability: task-flow-engine
     kinds: [request, work]
     owner: activity-core